I've just cooked a 2.5lb gammon joint in my halogen oven, I spiked it top and bottom with a fork, then rubbed it all over with brown sugar and wrapped it in foil and cooked it at 200 degrees for 20 minutes per lb plus 20 mins.......I cooked it on the high shelf with the extender ring.......it was as good as when I cooked it in my fan oven....if not slightly more tender. I have a 12 litre HO if that helps.....it tastes gorgeous